The electronegativity of an element can be expressed as ½(I + E_a)where I is the ionization energy and E_a is the electron affinity.

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This expression is known as the Pauling electronegativity scale and is a way to quantify how strongly an atom can attract electrons towards itself in a covalent bond. It takes into account both the tendency to lose electrons (ionization energy) and the tendency to gain electrons (electron affinity).

The Electronegativity of an Element Can Be Expressed as ½(I